code: def exists(path: str) -> bool:
      if path.startswith("s3://"):
          return S3Config().get_s3_client().exists(path)
      elif path.startswith("gs://"):
          return GCSConfig().get_gcs_client().exists(path)
      else:
          raise
  
file_path: gokart/gokart/object_storage.py
imports: from datetime import datetime
  import luigi
  import luigi.contrib.gcs
  import luigi.contrib.s3
  from luigi.format import Format
  from gokart.gcs_config import GCSConfig
  from gokart.gcs_zip_client import GCSZipClient
  from gokart.s3_config import S3Config
  from gokart.s3_zip_client import S3ZipClient
  from gokart.zip_client import ZipClient
label_desc: Use image node_id 3 for calling the ObjectStorage obj's underlying member method code with example usage: obj.exists(path) and returns: S3Config, GCSConfig